1 research outputs found
The influence of substituents on the properties of certain pyrazolines, with particular regard to fluorescence
The preparation of a series of thirty -five
pyrazolines and two anomalous compounds (the
latter obtained from cinnamylideneacetophenone
and cinnamylidenepinacoline, respectively),
twenty -five of which are believed to be new,
is described.Most of these pyrazolines fluoresce in
the solid state on exposure to ultraviolet rays.
Many fluoresce in daylight when dissolved in
organic solvents. Of those which exhibit no
visible fluorescence in daylight, many fluoresce
in ultraviolet rays; those which fluoresce in
daylight do so with increased brilliance on
ultraviolet irradiation.The behaviour of the members of the
series in alcoholic, chloroform and benzene
solution, on exposure to ultraviolet rays, has
been investigated